I am printing now for a few months, and everything is going well, except 1 thing.
all things that i print and that must fit together, they don’t.
nothing fits good.
all setting of the printer are calibrated, also the extruder, and they have all good values.
I have searched the internet for an answer, but could not find one.
I have read that there are a lot of people with the same problem, but never read of an solution.
I use slic3r to slice the parts, and have tried several settings, even with the extruder multiplier on 0.9 or lower the parts wont’t fit.
one of the parts looks always to big, or to small.
I have tried cura also, but the prints sliced with slic3r looks much better than cura.
Cura gives the same results, parts don’t fit.
Is there somebody who know what i can do about this?
And knows of a good and simple calibration part?
You take into account the tolerances inherent in the production method and you adjust the size of the parts accordingly.
A 40mm round does not fit into a 40mm hole even when made on a high precision machine tool! You would instead achieve a transition fit. You need clearance between the parts for them to simply drop together.
A search on-line will find you much information on fits and tolerances.
Thanks for your answer Paul,
Yes i know that parts must have some clearance, when i design a part by myself is do give it some clearance.
But designs you can find on Thingiverse, i do not know if they have some clearance.
And i see that others who have printed these designs, that they do fit.
for example:
http://www.thingiverse.com/thing:651654
when i printed this design, the rings were to tight, it was not possible to put the rings over the inner tube, and when i do get one over the inner tube, the ring won’t turn.
And so there are a lot of designs that don’t fit when i print them, and it looks that other people don’t have the same problem.
So it must be the slicer settings i use
I use 0.2mm to 0.3 mm tolerance between parts to get a perfect fit.
0.2 is a keeper, needs force to come apart.
Succes
Are those tolerances you need to design in at design stage
Or can you apply via slicer for items you download from thing inverse for example
Tks
[quote=“ndillane”]Are those tolerances you need to design in at design stage
Or can you apply via slicer for items you download from thing inverse for example
Tks[/quote]
Usually you have to design them in. It’s the only reliable way.
If you don’thave the STL sources, you can try to tinker with very small scaling factors.
Here is the same issue. Don’t know what to do.
I’m making test print cube 20mm with cylindrical hole 10mm and same high cylinder 10mm diameter.
After printing, all outer dimensions was 0.2mm bigger (expected), except cylindrical hole - that was only 9mm!
I’m use standard settings for PLA from Velleman k8200.eu/support/downloads “CUSTOM REPETIER HOST FOR VELLEMAN K8200 3D PRINTER”
[quote=“uldemir”]Here is the same issue. Don’t know what to do.
I’m making test print cube 20mm with cylindrical hole 10mm and same high cylinder 10mm diameter.
After printing, all outer dimensions was 0.2mm bigger (expected), except cylindrical hole - that was only 9mm!
I’m use standard settings for PLA from Velleman k8200.eu/support/downloads “CUSTOM REPETIER HOST FOR VELLEMAN K8200 3D PRINTER”[/quote]
Cylinders and curves can only be aproxximated with g-code.
Every object consists of small triangles that try to recreate the surface.
Thus cylinders and curves can only be representes as polygons, not really round.
This causes cylindrical holes to be smaller, especially low diameter ones.
So if you want cylindrical holes that fit, always design them a little bigger in diameter or,
preferrably, drill them after printing.
cheers,
Christian
Some additional info. Model prepared with Design Spark Mechanical, exported to *.OBJ and imported in repetier. I think there no some lost what do .stl format. And the same problem with another objects downloaded from thinginverse.
Now I’m making drill. But what to when printing caps with screw?
[quote=“uldemir”]Some additional info. Model prepared with Design Spark Mechanical, exported to *.OBJ and imported in repetier. I think there no some lost what do .stl format. And the same problem with another objects downloaded from thinginverse.
Now I’m making drill. But what to when printing caps with screw?[/quote]
You then have do design the toleranes in, or if you can’t (ready made model) You can try saling the cap up a tiny bit.
cheers,
Christian
Sorry for the late response, yes the tolerance are designed in the model from the beginning.
[quote=“ichbinsnur”][quote=“ndillane”]Are those tolerances you need to design in at design stage
Or can you apply via slicer for items you download from thing inverse for example
Tks[/quote]
Usually you have to design them in. It’s the only reliable way.
If you don’thave the STL sources, you can try to tinker with very small scaling factors.[/quote]